Spirit-blowpipe.



PATENTED FEB. '7, 1905.

A. H. 0. JACKSON.

SPIRIT BLOWPIPE.

APPLICATION FILED m2. 7. 1904.

2 SHEETSSHEBT 1.

PATENTED FEB 7, 1905 2 SHEETS-SHEET 2 Mw M A. H. 0. JACKSON.

SPIRIT BLOWPIPE.

APPLIOATION FILED MAR. 7, 1904.

UNTTED STATES Patented February '7, 1905.

PATENT @FFICE.

SPlRlT-BLOWPIPE.

SPECIFICATION forming part of Letters Patent No. 782,136, dated February7, 1905.

Application filed March 7, 1904. Serial No. 196,940.

To 1177 ll']! 01 2 if may concern:

Be it known that I ALBERT H nxnr OAKLEY .lwksox. a subject of the Kingof Great Britain. and a resident of Brookwood, in the county of Surrey,England, have invented new and useful Improvements in Spirit-Blowpipes;and I do hereby declare the following to be a full, clear. and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to an apparatus for safely producing a flame ofgreat heat from a mixture of inflammable spirit, preferably the spiritknown as petroleum, and cold air. As petroleum vaporizes naturally, itwill vap orize to a greater extent in a given space under a forced draftof air, and so form a readilycomlmstible vapor burning at a very hightemperature. which may be used for many purposes where great heat isrequired to be concentrated upon a given spot, particularly for brazingmetals. An advantage of this apparatus is that the mixture of air andpetroleum readily ignites by a light being applied without any heatingof the nozzle, as is necessary with other apparatus using spirit.

According to this invention I construct a blowpipc for petroleum and airin such a manner that it will utilize the forced draft of cold air tocool every part holding the petroleum, it being necessary for safetypurposes when using petroleum that the reservoir of petroleum and thefeed-pipe of same to the burning-nozzle be kept perfectly cool. Theshape of the blow-pipe may be varied to suit particular purposes of useand be made portable or fixed without in any Way departing from theinvention.

To enable my invention to be fully understood, I will proceed todescribe the same with aid of the accompanying drawings, in which Figure1 illustrates a sectional view of a complete portable apparatus of usualconstruction; Fig. 2, an elevational view of same; Fig. 3, across-sectional view on line a I) of Fig. l, and Fig. & a view of rearend nozzle.

A represents the body of the apparatus to be held by hand of operator.This bod yis divided into two portions B and C. A suitable manner offorming this body is Iirst to make the B portion and then solder ontosame the C portion. The B partis the petroleum-reservoir, and the (,7part for the passing draft of cold air to enable the latter to give acooling effect to the whole bottom of the petroleumreservoir B.

D is the filling-nozzle for the petroleum, internally fitted with ascrew-stopper, with a small air-hole through same.

Near the front end of the body A is fitted the special valve arrangementpreferred to be used for feeding the petroleum to the burning-nozzle;but any other form of valve suitable for the purpose can be used. It isessential for proper brazing that the heat should be varied, and by thisapparatus this variation is effected by varying the quantity ofpetroleum to the lnirning-uozzle.

onnected to the top of the reservoir B is a short bracket F, to which ispivoted a lever G, to be depressed by the contraction of the fingers ofthe operator holding the body. This movement of the lever operates thevalve to regulate the supply of petroleum, as hereinafter explained.

To prevent accidentally an undue quantity of petroleum being passed andto lock the valve arrangement when the apparatus is not in use if thereservoir contains spirit, 1 provide a lock set-screw I l, carried by abracket J, secured to top of reservoir B. The distance the valve can beopened by depressing the lever G is set by raising more or less thepoint of the screw H. The front end of the lever G is pivoted to the topof a plunger K, the bottom of which is round and fiat-faced and bearsupon a packing-piece or washer L, of leather, held in a recess M in thebottom of the reservoir B. The bottom of the recess and the washer havea small hole through same for outlet of petroleum. The plunger K isnormally held down on the washer to cut off the outlet of petroleum bythe spiral spring N. To prevent leakage of petroleum at top of plunger,the latter is fit-ted with a stufiings box 0 of usual construction.Connected to the under side of the small outlet for the petroleum is thefeedpipe P to carry and feed the petroleum into the burning-nozzle Q.The rear end of the latter is rectangular, and the body said air-conduittapering toward its outlet and part verging into round at the burningend. This part may be thickened by an extra band of metal. This nozzleis made of sheet-steel. The top and back of nozzle are drilled withsmall holes R to admit supplementary streams of cold air to form eddieswithin the nozzle, which assists the vaporizing of the petroleum and itsmixture with the air, thereby increasing the heat of the flame producedfrom the nose of the nozzle. The latter has attached to the back areduced socket S, by which it is fitted upon the forced-draft pipe T,through which also passes the petroleum-supply pipe P, thereby keepingthis pipe and the petroleum in it cool. This pipe T is connected to thefront of the air-chamber C. The air enters at the back end through thepipe U, connected to a suitable supply of air under pressure. V is anopening in the bottom of air-chamber C to enable the interior to beinspected. This opening is closed by screwed cap W.

Having now described my invention, what I desire to secure by LettersPatent of the United States is 1. A compound blowpipe comprising aspirit-reservoir, a compressed-air conduit adjacent thereto, aburning-nozzle having a contracted outlet attached to said air-conduitprovided with perforations in one of its walls for admitting the outsideair to the interior thereof, and means for supplying spirit to saidnozzle, substantially as described.

2. A compound blowpipe comprising a jacent thereto, a burning-nozzleattached to provided with a series of perforations in its rear wallsurrounding said air-conduit, and means for supplying spirit to saidnozzle, substantially as described.

3. A compound blowpipe comprising a spirit-reservoir, a compressed-airconduit adjacent thereto, a burning-nozzle attached to said air-conduittapering toward its outlet provided with perforations in the rear andside walls thereof, and means for supplying spirit to said nozzle,substantially as described.

4. A compound blowpipe comprising asuitable tank, a centrally-arrangedpartition therein dividing said tank into spirit and air chambers, aburning-nozzle having a contracted outlet connected to said air-chamberprovided with perforations in one of its walls for admitting the outsideair to the interior thereof, means for supplying spirit to said nozzleand a valve for regulating the amount of said supply, substantially asdescribed.

5. A compound blowpipe comprising a suitable tank, a centrally-arrangedpartition dividing said tank into spirit and air chambers, an air-pipeleading from said aircharnber, a perforated burning-nozzle attachedthereto, a spirit-supply pipe leading from said partition to saidburning-nozzle lying within said air- .pipe for substantially the wholeof its length, and means for regulating the supply of spirit,substantially as described.

ALBERT HENRY OAKLEY JACKSON.

Witnesses:

R. 'WEs'rAooTT, A. NUTTING.

